The director of the National Portrait Gallery, Andrew Sayers (r), talks with German diplomat Hubertus Klink about 'Portrait of Dr. Johann Reinhold Forster and his son, George Forster (1780), made by French artist Jean François Rigaud. Photo: EFE/Alan Porritt.

CANBERRA.-The National Portrait Gallery has unveiled its newest major acquisition, Portrait of Dr Johann Reinhold Forster and his son George Forster 1780 by Jean François Rigaud. The lively, intimate and atmospheric portrait of the father-and-son naturalist team was painted the year after the death of Captain James Cook, with whom they had sailed on the Resolution between 1772 and 1775. The new acquisition will hang next to the painting of John Webbers Captain James Cook RN 1782; being the only eighteenth-century paintings in the collection. The painting of the Forsters will be the first major acquisition of the National Portrait Gallery to signify the development of the Australian colonies in the context of the European  as distinct from the English  Enlightenment.

Johann Reinhold Forster (1729-1798) and his son George Forster (1754-1794), polymaths, travelled as naturalists on James Cook's second great voyage of exploration, on the Resolution between 1772 and 1775. Johann Forster was not a natural seaman, and his journal paints a sensitive picture of the hardships of the expedition as well as the peoples, animals and plants encountered on its course. The Admiralty barred Johann from publishing on the trip, but George wrote an outstanding scientific account of it that became a bestseller. Henceforth the Forsters were renowned as the European experts on the Pacific. George's essay 'Neuholland und die brittische Kolonie in Botany-Bay' (1786) was an upbeat description of the geography, inhabitants and resources of the colony, for which he predicted a bright future. His long essay Cook, der Entdecker (Cook, the Discoverer), published in 1787 as the introduction to his German translation of the account of Cook's third, fatal voyage, was the first major contemporary assessment of James Cook, and it remains the only substantial account of the great man by someone who knew him well.

Though only recently published in English, Cook, the Discoverer is now recognized as the starting point for the vast academic and popular enterprise that Cook scholarship has since become. In the early 1790s, before he predeceased his father, George Forster reviewed accounts of the new land by Watkin Tench, Arthur Phillip and John White for German readers. In this way he contributed greatly, as did Johann Forster, to German interest in the Antipodes. The French-Italian artist Jean Rigaud trained in Italy, where he became a member of the Bologna Academy in 1766. Relocating to England in 1772, he exhibited at the Royal Academy, and was made an Academician in 1784. Though painted in London, the Forsters' portrait is set in New Zealand. Johann is depicted with a sprig of Forstera sedifolia tucked in his hatband and a bellbird (Anthornis melanura) in his hand; specimens of a wattlebird, a saddleback and a honeyeater lie lifeless on the ground.